CN207394813U - Low low-level (stack-gas) economizer Two-way Cycle heating system - Google Patents
Low low-level (stack-gas) economizer Two-way Cycle heating system Download PDFInfo
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- CN207394813U CN207394813U CN201720571142.2U CN201720571142U CN207394813U CN 207394813 U CN207394813 U CN 207394813U CN 201720571142 U CN201720571142 U CN 201720571142U CN 207394813 U CN207394813 U CN 207394813U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 260
- 230000001105 regulatory Effects 0.000 claims abstract description 33
- 238000009833 condensation Methods 0.000 claims abstract description 27
- 230000005494 condensation Effects 0.000 claims abstract description 27
- 238000009998 heat setting Methods 0.000 claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 239000003245 coal Substances 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 230000003020 moisturizing Effects 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 235000014171 carbonated beverage Nutrition 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 35
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 17
- 239000003546 flue gas Substances 0.000 abstract description 11
- 239000002918 waste heat Substances 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000001556 precipitation Methods 0.000 abstract description 2
- 239000000779 smoke Substances 0.000 description 4
- 239000003595 mist Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
A kind of low low-level (stack-gas) economizer Two-way Cycle heating system, belongs to power-saving technology, particularly flue gas in power station boiler heat recovery technology field, it is included into stove wind heating system, it is characterized in that further including condensation water heating system；Low low-level (stack-gas) economizer is connected to by booster pump and water regulating valve into stove wind heating system and condensation water heating system；It is described to include vapor-water heat exchanger, a warm-air drier, secondary warm-air drier, air preheater into stove wind heating system；The condensation water heating system includes vapor-water heat exchanger, water water- to-water heat exchanger, water compensating valve, temperature sensor.The utility model realizes heating boiler wind pushing temperature and heat-setting water system while can reducing electric precipitation inlet flue gas temperature, realizes the purpose that safety and stability, waste heat are applied more.
Description
Technical field
The invention belongs to power-saving technologies, particularly flue gas in power station boiler heat recovery technology field.
Background technology
With country to energy conservation and environmental protection work pay attention to day by day, thus for improve boiler thermal efficiency it is increasingly urgent, wherein profit
It is one of the most effective ways with boiler exhaust gas waste heat.Heat loss due to exhaust gas is decided by exhaust gas temperature and exhaust smoke level.Boiler model one
It is fixed, what exhaust smoke level was to determine.
At present mostly flue gas heat loss is reduced by reducing exhaust gas temperature.Research shows that boiler smoke temperature often reduces
15~20 DEG C can improve boiler thermal efficiency 1%, therefore reduction boiler smoke temperature has become an important way of boiler energy-saving
Footpath.
Generation current factory reduce exhaust gas temperature, and the form of Mist heat recovering be independent heat-setting water or
Joint steam air heater heating First air, Secondary Air, it is impossible to rationally using fume afterheat, and run there are some potential safety problems, it is hot
Amount waste is serious, causes shortage of heat sometimes.
The content of the invention
It is an object of the present invention to provide safety and stability, it is easy to operate, reasonable utilize boiler tail flue gas waste heat one kind it is low
The double heating circulation systems of warm economizer and its method.It improves condensing water temperature while First air and Secondary Air is heated.
A kind of low low-level (stack-gas) economizer Two-way Cycle heating means, it is characterized in that using boiler tail flue gas waste heat into stove wind system
System and the heating of heat-setting water system.
A kind of low low-level (stack-gas) economizer Two-way Cycle heating system, including into stove wind heating system, it is characterized in that further including condensation
Water heating system；Stove wind heating system is connected to low temperature by booster pump and water regulating valve with condensation water heating system and saves
Coal device.
It is described to include vapor-water heat exchanger, a warm-air drier, secondary warm-air drier, air preheater, vapour into stove wind heating system
The discharge pipe of water- to-water heat exchanger is connected in parallel once warm-air drier, secondary warm-air drier；Warm-air drier, secondary warm-air drier are all connected with sky
Air preheater, air preheater connect low low-level (stack-gas) economizer；
Tunnel inlet where warm-air drier, secondary warm-air drier is equipped with regulating valve, a warm-air drier, secondary warm-air drier
The ducting outlet at place is equipped with ducting outlet temperature sensor,
The condensation water heating system includes vapor-water heat exchanger, water water- to-water heat exchanger, water compensating valve, temperature sensor, and water water changes
The air outlet of the air inlet connection vapor-water heat exchanger of hot device, the water return outlet of the water outlet connection condensate system of water water- to-water heat exchanger,
Return water temperature sensor is installed on the water return pipeline；The water inlet of water water- to-water heat exchanger connects condensation water by condensing water regulating valve
The water outlet of system is equipped with flow control valve on the water inlet pipe of water water- to-water heat exchanger, and the air outlet of water water- to-water heat exchanger is connected into stove
The wind pipe of the Secondary Air of wind heating system；Water supply electrically operated valve is installed between condensation water and circulating water line.
The flue outlet of the low low-level (stack-gas) economizer is equipped with stack outlet temperature sensor.
Present invention additionally comprises controller, the condensation water inlet pipeline installation condensation water regulating valve, water return pipeline installs back
Water temperature sensor, it is circulation moisturizing to install water supply electrically operated valve between condensation water and circulating water line additional.Recirculated water side is low
Booster pump, flue outlet mounting temperature sensor where low low-level (stack-gas) economizer, low low-level (stack-gas) economizer are installed in low-level (stack-gas) economizer import
Import installation and adjustment valve, return water install regulating valve, ducting outlet mounting temperature sensor where warm-air drier additional before entering steam air heater.It is low
Low-level (stack-gas) economizer is exported directly installs vapor-water heat exchanger additional with warm-air drier unicom, and liquid level gauge, steam-water heat exchanging are installed on vapor-water heat exchanger
Blowdown motor-driven valve is installed in device blowdown.
The return water temperature sensor signal output terminal is connected with controller signals receiving terminal, controller signals output terminal with
Condense the connection of water regulating valve signal receiving end.
Stack outlet temperature sensor signal output terminal where low low-level (stack-gas) economizer is connected with controller signals receiving terminal, is controlled
Device signal output part processed is connected with low low-level (stack-gas) economizer inlet adjusting valve signal receiving terminal.
Ducting outlet temperature sensor signal output terminal where warm-air drier is connected with controller signals receiving terminal, controller letter
Number output terminal is connected with into steam air heater regulating valve signal receiving end.
Vapor-water heat exchanger liquid level gauge signal output part is connected with controller signals receiving terminal, controller signals output terminal and vapour
Water- to-water heat exchanger blowdown motor-driven valve signal receiving end connects.
Low low-level (stack-gas) economizer Two-way Cycle is heated into stove wind and condensate system, including low adding system, low low-level (stack-gas) economizer, is warmed up
Wind device, vapor-water heat exchanger, water water- to-water heat exchanger, water charging system draw condensate line as water inlet pipe from a low adding system entrance
It is connected with water water- to-water heat exchanger, then returnes to another low adding system outlet；Condensate pipe pass is directly connected to heat medium water all the way
System simultaneously passes through motor-driven valve and pipeline progress moisturizing, and heating agent water system installation booster pump is with low low-level (stack-gas) economizer unicom as low
The water inlet of warm economizer, return water converge to supercharging pump inlet after vapor-water heat exchanger respectively enters steam air heater and water water- to-water heat exchanger
It is cycled.
The present invention has following advantageous effects：
（1）Traditional surplus heat of power plant recovery system utilizes the temperature for absorbing boiler tail flue gas waste-heat First air and Secondary Air
Degree, the present invention not only heat the temperature of First air and Secondary Air, and by boiler tail waste heat heat-setting water.
（2）Traditional surplus heat of power plant recovery system utilizes the temperature for absorbing boiler tail flue gas waste-heat First air and Secondary Air
Degree, when exhaust gas temperature reduces, recirculated water absorbs heat First air and the heat of Secondary Air is inadequate；The present invention increases carbonated drink and changes
Hot device heats the air themperature into steam air heater to heat cycles water, can to avoid shortage of heat.
（3）The present invention realizes heating boiler wind pushing temperature and heat-setting water while can reducing electric precipitation inlet flue gas temperature
System realizes the purpose that safety and stability, waste heat are applied more.
（4）Moisturizing of the present invention is automatically replenished using condensation water pressure more than heating agent water pressure, is not required to increase small pump.
（5）Connection and reasonable arrangement causes Mist heat recovering to make full use of, and has not only improved First air and Secondary Air temperature, but also heating
Condensed water in boiler saves coal consumption.
（6）Condensation water side of the present invention is into return water use across grade（One low plus preceding water intaking, another low plus outlet return water）Pressure
Force difference, condensation water can automatic running, booster pump need not be installed.
（7）Heat medium water of the present invention and condensate system are arranged apart so that heat medium water water quality requirement is relatively low, so as to not influence
Condensation water water quality.
Description of the drawings
Fig. 1 is the structure diagram of the present invention.
In figure, 1, water water- to-water heat exchanger, 2, booster pump, 3, low low-level (stack-gas) economizer, 4, vapor-water heat exchanger, 5, steam air heaters,
6th, secondary steam air heater, 7, condensing water flow regulating valve, 8, water water- to-water heat exchanger outlet heating agent water temperature sensor, 9, water water- to-water heat exchanger
Export condensing water temperature sensor, 10, low low-level (stack-gas) economizer entrance water regulating valve, 11, vapor-water heat exchanger into steam control valve,
12nd, a steam air heater entrance water regulating valve, 13, steam air heater ducting outlet air temperature sensor, 14, secondary steam air heater
Entrance water regulating valve, 15, secondary steam air heater ducting outlet air temperature sensor, 16, low low-level (stack-gas) economizer exiting flue gas temperature
Spend sensor, 17, water supply electrically operated valve.
Specific embodiment
The low low-level (stack-gas) economizer Two-way Cycle of the present invention is heated below in conjunction with the accompanying drawings further into stove wind and condensate system
Explanation.
As shown in Figure 1, the low low-level (stack-gas) economizer Two-way Cycle of the present invention is heated into stove wind and condensate system, exchange heat including water water
Device 1, booster pump 2, low low-level (stack-gas) economizer 3,4, steam air heaters 5 of vapor-water heat exchanger, secondary steam air heater 6, condensing water flow are adjusted
Valve 7, water water- to-water heat exchanger outlet heating agent water temperature sensor 8, water water- to-water heat exchanger outlet condensing water temperature sensor 9, low temperature save
Coal device entrance water regulating valve 10, vapor-water heat exchanger are into 11, steam air heater entrance water regulating valves 12 of steam control valve, once warm up
Wind device ducting outlet air temperature sensor 13, secondary steam air heater entrance water regulating valve 14, secondary steam air heater ducting outlet are empty
Gas temperature sensor 15, low low-level (stack-gas) economizer exit gas temperature sensor 16, water supply electrically operated valve 17.
The condensation water water outlet of water water- to-water heat exchanger 1 is equipped with temperature sensor 9, the heat medium water water outlet of water water- to-water heat exchanger 1
Temperature sensor 8 is installed, water water- to-water heat exchanger 1 connects low low-level (stack-gas) economizer 3 with pipeline by booster pump 2, regulating valve 10；It is low
Warm economizer 3 is connected by pipeline with electric precipitator, and being equipped with low low-level (stack-gas) economizer on the output channel of low low-level (stack-gas) economizer 3 goes out
Mouth flue-gas temperature sensor 16；
Low low-level (stack-gas) economizer 3 is also respectively connected with vapor-water heat exchanger 4 and air preheater；One end connection of vapor-water heat exchanger 4
To trench, the other end of vapor-water heat exchanger 4 is connected to vapor-water heat exchanger into steam control valve 11；
Steam air heater 5 is in parallel with secondary steam air heater 6 and one end（Output terminal）It is connected with booster pump 2；Steam air heater 5
Input terminal is connected all the way through a steam air heater ducting outlet air temperature sensor 13 with air preheater, and another way is through once warming up
Wind device entrance water regulating valve 12 is connected on the connecting line of water water- to-water heat exchanger and vapor-water heat exchanger；Secondary steam air heater 6 it is defeated
Enter end to be connected with air preheater through secondary steam air heater ducting outlet air temperature sensor 15 all the way, another way is through secondary warm wind
Device entrance water regulating valve 14 is connected on the connecting line of water water- to-water heat exchanger and vapor-water heat exchanger；
The input terminal of water water- to-water heat exchanger connect respectively vapor-water heat exchanger, through condensing water flow regulating valve 7 with（Low temperature adds in
Device）Connection；
The output terminal of water water- to-water heat exchanger connects all the way through water water- to-water heat exchanger outlet condensing water temperature sensor 9（Low temperature adds in
Device）, another way is through 8 connection booster pump of water water- to-water heat exchanger outlet heating agent water temperature sensor.
Water supply electrically operated valve 17 is mounted between condensation water and circulating water line.
The low low-level (stack-gas) economizer Two-way Cycle of the present invention is heated into stove wind and condensate system passes through benefit using low low-level (stack-gas) economizer
Water electrically operated gate starts booster pump progress shuttling movement, low low-level (stack-gas) economizer entrance to heat medium water system water supplement after system full water
The low low-level (stack-gas) economizer exit gas temperature sensor settings of the chain target temperature of water regulating valve are automatic, water flow to be controlled to realize
The purpose of cooling, the chain warm-air drier ducting outlet air temperature sensor of a warm-air drier entrance water regulating valve, to control
Water flow processed realizes the purpose of First air heating, and the secondary chain secondary warm-air drier ducting outlet of warm-air drier entrance water regulating valve is empty
Gas temperature sensor, water flow to be controlled to realize the purpose of Secondary Air heating, the chain water water- to-water heat exchanger of condensing water flow regulating valve
Condensing water temperature sensor is exported, condensing water flow to be controlled to realize the purpose of condensation water heating, water water- to-water heat exchanger heat-setting
Water, vapor-water heat exchanger additional heat deficiency.
Claims (6)
1. a kind of low low-level (stack-gas) economizer Two-way Cycle heating system, including into stove wind heating system, it is characterized in that further including condensation water
Heating system；Stove wind heating system is connected to low temperature by booster pump and water regulating valve with condensation water heating system and saves coal
Device；
Described to include vapor-water heat exchanger, a warm-air drier, secondary warm-air drier, air preheater into stove wind heating system, carbonated drink is changed
The discharge pipe of hot device is connected in parallel once warm-air drier, secondary warm-air drier；Warm-air drier, that secondary warm-air drier is all connected with air is pre-
Hot device, air preheater connect low low-level (stack-gas) economizer；
Tunnel inlet where warm-air drier, secondary warm-air drier is equipped with regulating valve, a warm-air drier, secondary warm-air drier place
Ducting outlet be equipped with ducting outlet temperature sensor；
The condensation water heating system includes vapor-water heat exchanger, water water- to-water heat exchanger, water compensating valve, temperature sensor, water water- to-water heat exchanger
Air inlet connection vapor-water heat exchanger air outlet, water water- to-water heat exchanger water outlet connection condensate system water return outlet, this time
Return water temperature sensor is installed in water lines；The water inlet of water water- to-water heat exchanger connects condensate system by condensing water regulating valve
Water outlet, flow control valve is installed on the water inlet pipe of water water- to-water heat exchanger, the air outlet of water water- to-water heat exchanger is connected to be added into stove wind
The wind pipe of the Secondary Air of hot systems；Water supply electrically operated valve is installed between condensation water and circulating water line.
2. a kind of low low-level (stack-gas) economizer Two-way Cycle heating system according to claim 1, it is characterized in that the low temperature saves coal
The flue outlet of device is equipped with stack outlet temperature sensor.
3. a kind of low low-level (stack-gas) economizer Two-way Cycle heating system according to claim 1, it is characterized in that the low temperature saves coal
Device Two-way Cycle heating system further includes controller, and return water temperature sensor signal output terminal is connected with controller signals receiving terminal,
Controller signals output terminal is connected with condensation water regulating valve signal receiving end；Stack outlet temperature sensing where low low-level (stack-gas) economizer
Device signal output part is connected with controller signals receiving terminal, and controller signals output terminal is believed with low low-level (stack-gas) economizer inlet adjusting valve
The connection of number receiving terminal；Ducting outlet temperature sensor signal output terminal where warm-air drier is connected with controller signals receiving terminal, is controlled
Device signal output part processed is connected with into steam air heater regulating valve signal receiving end；Vapor-water heat exchanger liquid level gauge signal output part and control
Device signal receiving end connection processed, controller signals output terminal are connected with vapor-water heat exchanger blowdown motor-driven valve signal receiving end.
4. a kind of low low-level (stack-gas) economizer Two-way Cycle heating system according to claim 3, it is characterized in that the condensation water inlet
Pipeline installation and adjustment valve, return water mounting temperature sensor install motor-driven valve additional as recirculated water between condensation water and circulating water line
System water supplement；The low low-level (stack-gas) economizer import installation booster pump in recirculated water side, flue outlet installation temperature where low low-level (stack-gas) economizer
Sensor, low low-level (stack-gas) economizer import installation and adjustment valve, return water install regulating valve additional before entering steam air heater, and air passage where warm-air drier goes out
Mouth mounting temperature sensor；The outlet of low low-level (stack-gas) economizer and warm-air drier unicom directly install vapor-water heat exchanger additional, on vapor-water heat exchanger
Liquid level gauge, vapor-water heat exchanger blowdown installation motor-driven valve are installed.
5. a kind of low low-level (stack-gas) economizer Two-way Cycle heating system according to claim 1, it is characterized in that further include low adding system,
Low low-level (stack-gas) economizer, steam air heater, vapor-water heat exchanger, water water- to-water heat exchanger, water charging system draw condensation water from a low adding system entrance
Pipeline is connected as water inlet pipe with water water- to-water heat exchanger, then returnes to another low adding system outlet；Condensate pipe pass is all the way
It is directly connected to heating agent water system and passes through motor-driven valve and pipeline progress moisturizing, heating agent water system installation booster pump and low temperature province coal
As the water inlet of low low-level (stack-gas) economizer, return water converges device unicom after vapor-water heat exchanger respectively enters steam air heater and water water- to-water heat exchanger
Supercharging pump inlet is closed to be cycled.
6. a kind of low low-level (stack-gas) economizer Two-way Cycle heating system according to claim 1, it is characterized in that saving coal using low temperature
Device, to heat medium water system water supplement, is started booster pump after system full water and carries out shuttling movement, low temperature saves by moisturizing electrically operated gate
The low low-level (stack-gas) economizer exit gas temperature sensor settings of the chain target temperature of coal device entrance water regulating valve are automatic, to control water
Flow realizes the purpose of cooling, the chain warm-air drier ducting outlet air themperature sensing of a warm-air drier entrance water regulating valve
Device, water flow to be controlled to realize the purpose of First air heating, the secondary chain secondary warm-air drier wind of warm-air drier entrance water regulating valve
Road exports air temperature sensor, water flow to be controlled to realize the purpose of Secondary Air heating, the chain water of condensing water flow regulating valve
Water- to-water heat exchanger exports condensing water temperature sensor, condensing water flow to be controlled to realize the purpose of condensation water heating, water water- to-water heat exchanger
Heat-setting water, vapor-water heat exchanger additional heat deficiency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720571142.2U CN207394813U (en) | 2017-05-22 | 2017-05-22 | Low low-level (stack-gas) economizer Two-way Cycle heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720571142.2U CN207394813U (en) | 2017-05-22 | 2017-05-22 | Low low-level (stack-gas) economizer Two-way Cycle heating system |
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| CN207394813U true CN207394813U (en) | 2018-05-22 |
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| CN201720571142.2U Active CN207394813U (en) | 2017-05-22 | 2017-05-22 | Low low-level (stack-gas) economizer Two-way Cycle heating system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108800598A (en) * | 2018-06-22 | 2018-11-13 | 中国电建集团都江电力设备有限公司 | Flue gas heat recovery combines the wide load adjustment method of the double bypasses of steam air heater |
| CN113310042A (en) * | 2021-05-21 | 2021-08-27 | 华能国际电力股份有限公司大连电厂 | Low-temperature coal-saving self-adjusting system for thermal power plant |
-
2017
- 2017-05-22 CN CN201720571142.2U patent/CN207394813U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108800598A (en) * | 2018-06-22 | 2018-11-13 | 中国电建集团都江电力设备有限公司 | Flue gas heat recovery combines the wide load adjustment method of the double bypasses of steam air heater |
| CN108800598B (en) * | 2018-06-22 | 2020-08-18 | 中国电建集团都江电力设备有限公司 | Flue gas waste heat recycling combined air heater double-bypass wide-load adjusting method |
| CN113310042A (en) * | 2021-05-21 | 2021-08-27 | 华能国际电力股份有限公司大连电厂 | Low-temperature coal-saving self-adjusting system for thermal power plant |
| CN113310042B (en) * | 2021-05-21 | 2022-11-29 | 华能国际电力股份有限公司大连电厂 | Low-temperature economizer self-adjusting system for thermal power plant |
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